OCPTY AM131779 PTO Clutch Replacement for John Deere: AM131779, for Ogura: MA-GT-JD23BF MAGTJD23BF Mower Clutch fit for John Deere GX335-GX345,325-335-345,GX355,for Rotary: 15779, for Xtreme: X0411

What It Is

This is an aftermarket electric PTO (power take-off) clutch that engages and disengages the mower blades on select John Deere lawn tractors. It replaces OEM part AM131779 and is designed for 48-inch and 54-inch deck models in the GX and 300 series.

Fitment & Compatibility

Before buying, verify these three things:

Model fit: Confirmed compatible with John Deere GX335, GX345, 325, 335, 345, GX355. Also fits Rotary 15779 and Xtreme X0411 applications. Not compatible with X300, X500, or 400 series tractors.

Deck size: Works with 48-inch and 54-inch decks only. Measure your deck width.

Physical dimensions: The clutch has a 1-inch bore, 2.75-inch shaft height, and 4.5-inch overall height. Measure your existing clutch or the shaft it mounts to—if your tractor uses a 7/8-inch or 1.125-inch shaft, this won’t fit.

Electrical: Single-wire engagement, 12V DC. Ensure your tractor’s wiring harness matches (most John Deere models in this series do).

Cross-reference: Also replaces Ogura MA-GT-JD23BF / MAGTJD23BF. If your original clutch has a different OEM number, pull it and compare dimensions.

Key Things to Know

• Rebuild vs replace: This is a complete replacement, not a rebuild kit. If your old clutch has worn bearings or a seized pulley, this is the right route.
• Installation difficulty: Moderate. You’ll need basic hand tools (socket set, puller, torque wrench). Expect 1–2 hours if you’ve done it before, longer if not. The air gap must be set to 0.012–0.020 inches using feeler gauges.
• Quality concerns: At 3.7 stars from only 6 reviews, reliability data is thin. Some users report noise or premature wear; others say it works fine. No warranty details listed—check return policy before buying.
• Wiring note: The single-wire connector may not match your tractor’s plug. You might need to splice or use a spade connector. Have heat shrink and crimp connectors ready.

Should You Buy It

Buy this if you need a budget-friendly replacement for a worn-out PTO clutch on a GX335, GX345, or similar 300-series John Deere with a 48/54-inch deck and you’re comfortable with basic wiring and mechanical work. Skip it if you want a brand-name OEM part with proven reliability, or if your tractor uses a different shaft size or deck—you’ll risk fitment issues.